Cell Biology Exam 2

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Photosynthesis is to the chloroplast as______ is to the mitochondria

Respiration

A typical cell must have 3 major components in order to perform all the activity of life. What 3 components?

Ribosome, DNA, Plasma membrane

SYnthesis of lipids and steroid take place in which organelle

Smooth ER

What is the job of sarcoplasmic membrane

Store and release calcium

Name three structures in plant cells that animal cells lack

cell wall, chloroplast. plastids

Virus

has dna and rna shape is defined by capsid

cell communication

plants: cytoplasmic bridges animals:gap junctions

RNA containing virus

Polio, TMV, HIV

The size range of most plant and animal cells is

10-100 μμm.

Ribosome subunit for prokaryotes

50s and 30s

Ribosome subunit for eurkaryotes

60s and 40s

Which of the following is most similar to the watson crick helix?

B-DNA

What is the relationship between chromosomes and chromatin?

Chromatin is a mixture of DNA and proteins that form chromosomes.

The ____ is comprised of the fluid portion of the cell and contains the organelles.

Cytoplasm

Name the manufacturing facilities of the cell

Endoplasmic Reticulum

enveloped virus

HIV

The _____ are prokaryotes that live in very salty enviornments.

Halophiles

DNA containing virus

Herpes, vaccine

The region within the prokaryotic cell where the DNA is located is known as the ________.

Nucleoid

Synthesis of ribosomes takes place in

Nucleolus

Which organelle has only a single membrane around it?

Peroxisomes

Name 3 kinds of plastids present in eukaryotic cells

amyloplasts, chloroplasts, chromoplasts

naked virus

capsid

Prions

causes neurological disease madcow

cell wall made of

cellulose microfibrild or silicon

what is the ectracellular matrix (ECM) made of

colllegen fibers and glycoproteins

The similarity in the evolutionary origins of mitochondria and chloroplasts has led to the development of the ________, which proposed that they were originally bacteria.

endosymbiont theory

Cytosol and cytoskeloton

inside of cell not occupied by nucleus and cytosol is semifluid substance

micotubules(what is, shape, size, evolution)

largest structure of cytoskeloton. hollow cylinder. 25nm diameter. a+b-tubulin-protofiliment- microtubule

non-naked virus

lipid envelope

3 kinds of cytoskeloton

microtubules, microfilimants, intermideate filimants

how many ribosomes in eukaryotic cells? prokaaryotic cells?

millions, thousands

intermideate filament(what is, how many classes, differ where)

most stable and least soluble. six classes. differ in N and C segment

functions of cell wall and extracellular matrix

motility and migration, division and cell differentiation

living or non living? virus

non-living

What name is given to each region of chromatin consisting of histones wrapped with DNA?

nucleosome

non enveloped virus

polio

What is polycistronic DNA

produced by bacteria. prokaryotic

Viroids(what is, where, how big, example)

small circular RNA found in plants smallest infectious agents cudang cudang

microfiliments(What is, provides? evolution)

smallest of cytoskeleton. provide cleavage furrow in cell division. g-actin-f-actin-microfiliments

The matrix to the mitocondria is the _____ to the chloroplast

stoma

ribosome subunit S

svedburg

protofiliments

tetramers form IF


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